Attachment for cultivators



May 5, 19:25. 1,536,367

WULFF ATTACHMENT FOR CULTIVATORS Filed April 26. 1923 2 Sheets-Sheet]maxim.

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May 5, 1925. 1536,36?

F.VVULFF ATTACHMENT FOR CULTIVATORS Filed Kg 11 26. 1923 2 Sheets-Sheet2 Patented May 5, 1925. v

FERDINAND WULFF, F EPJR IN, SOUTH DAKOTA.

ATTACHMENT FOR CULTIVATORS.

Application filed April 26, 1923.

To all whom it may concern:

' Be it"known that I, FERDINAND VVULFF, citizen of the United States,residing at Erwin, in the county of Kingsbury and State of South Dakota,have invented certain new and useful Improvements. in Attachments forCultivators, of which the following is a specification.

This invention relates to certain new and useful improvements in anattachment for cultivators, and has among its objects to provide animproved disk-supportingv arm and the mounting of the disk thereon.

A further object is to provide a novel support for holding the scraperblade adjustably against the inside or active face of the disk, saidsupport being anchored or secured to the disk mounting on the oppositeor outer side of said disk.

Another object resides in the provision of a single bolt of novel shapefor clamping the disk-supporting arm to the beam.

Further, the invention resides in the features of construction and thearrangements and combinations of parts hereinafter described andclaimed, reference being made to the accompanying drawings wherein:

Figure 1, is a fragmentary view depicting the present invention partlyin elevation and partly in vertical section;

Figure 2, is aplan view of the disk mounting on the arm as viewed fromthe plane of line 2--2 of Figure 1, and

Figure 3, is a similar view on line 3-3 of Figure 1 showing the cleaningblade.

Referring more in detail to the drawings, the disk-supporting arm 1 issecured to the beam 2 by an improved bolt 8 of Uformation with the legsbent in parallelism into U-shape and having their free ends threaded forthe reception of nuts 4, a connecting plate 5 being threaded over thefree ends so as to be secured against the beam by the nuts a. Thetightening of the latter,

therefore, firmly clamps the disk arm 1 to the beam. The provision ofthis single bolt eliminates the use of the four bolts formerly used andalso permits the removal and placement of the parts being more readilyefiected.

The arm is bent at right angles to pro vide an offset 6 from which thelower end portion 7 extends backwardly and downwardly at an incline. Thelowermost portion is provided with an opening to receive a pivot bolt 8,and on its extreme end, with Serial I\T'o. 634,586.

a threaded opening extending at. right angles to the former opening toreceive a set screw 9, said extreme endportion tapering off, as isclearly depicted in Figure 1.

A'foot 10 is provided with a tapered bearing 11 in which is journal'edthe hub 12 of the disk 13, the hub being secured in its bearing by thebolt 14 and its cooperating nut 15 and washer 16. The bolt is formedwith a portion 17 of polygonai cross section which holds the sameagainst turning in the hub, while the foot is countersunk to receivethe'washer and nut. A socketed stem 18 extends laterally from the footand receives the lower end of the arm or standard 1 to which it ispivotally attached by the bolt 8. The socket is open on one side throughwhich the set screw 9 protrudes, the inner end of the screw im- 7 pingeson the inner or opposed wall of the socket so as to efiect angularadjustment on the foot and the disk about the pivot bolt 8.

A scraper or cleaner blade 19 operates in proximity to the concaved faceof the disk, the same being carried by a collar 20 which is axiallyadjustable on a concentrically disposed stub or finger 21. The latter isspaced or separate from the disk and is carried on the free end of anoverhanging arm 22 80 which is secured to the stem 18 by the common bolt8 and an additional bolt 23. This mounting provides for a fixed relationbetween the arm and disk, the bolt 8 functioning in the dual capacity ofpivoting the disk 00 and assisting in securing the scraper arm 22. Thescrew bolt 9 therefore effects a simultaneous adjustment of the disk andscraper. The foot 10 is preferably equipped with a source of lubricant24.

It will be noted that the central part of the disk 13 is depressed toconformably receive the bolt head and to snugly embrace the square orpolygonal portion 17. This construction affords stronger and moredurable mounting for the cultivator disk. Furthermore, very littlematerial is required to be cut away to fit the disk. The scraper bladeis also readily detached from its mounting 20, by removing the twoholding 106 bolts, and reversed, as indicated in dotted lines inFigure 1. Or, the collar 20 may be reversed by removing it from the stub21.

What is claimed is 1. In a plow disk mounting, a supporting 110 arm, afoot, an extension on the foot having spaced side walls open at theirfront and top portions and having a connecting back wall, said armextending downwardly through the open top of the extension and in thespace between the side walls thereof and having a rear edge inclineddownwardly and outwardly relative to and engageable with the back of theextension, a bolt pivot-- ally connecting the arm to the extension anddisposed adjacent to the upper end of the extension, a screw arrangedbelow the bolt and threaded through the lower end of the arm and havingits inner end bearing against the lower end of the said back wall of theextension and its outer end projecting outwardly beyond the front edgesof the side walls, and a disk carried by the foot.

2. In a plow disk mounting, a supporting arm, a foot, an extension onthe foot having spaced side walls open at their front and top portionsand having a connecting back wall, said arm extending downwardly throughthe open top of the extension, and in the space between the side wallsthereof and having a rear edge engageable with the back wall of theextension means to pivotally connect the arm to the extension, a screwadjustably carried by the arm in spaced relation to said pivotal meansand bearing at its inner end against the back wall of the extension, anda disk carried by the foot.

3. In a plow disk mounting, a supporting arm, a foot having an axialbearing, a lateral extension carried by the foot of sub stantiallyU-cross section and receiving the lower end of said arm therein andhaving its back wall engageable with the arm, a

bolt pivotally connecting the arm to the extension, a screw locatedbelow the first named bolt and threaded through the arm and hearingagainst the back of the extension, a disk having a hub received in thebearing and means to hold the hub in the bearing.

In testimony whereof I aiiix my signature.

FERDINAND WULFF.

